Question 1: What is the matrix used for? Answer: What is the use of matrix diagram method?
Matrix method is widely used. In quality management, matrix method is often used to solve the following problems:
① Find the breakthrough point of developing new products or improving old products according to the hardware function and software function of series products;
(2) Make clear the product quality characteristics that need to be guaranteed and their relationship with management agencies or guarantee departments, so as to make the quality assurance system more reliable;
③ Clarify the relationship between product quality characteristics, testing items and testing instruments, and strive to strengthen the quality evaluation system or improve its efficiency;
(4) When there are many undesirable phenomena in the production process, and they have several common reasons, I hope to find out the relationship between these undesirable phenomena and the reasons, and then eliminate them in one fell swoop;
⑤ Multivariate analysis, where to start and how to collect data.
Question 2: What is the use of matrices? For example, the current secret card is one of the common applications of matrix.
Question 3: What is a Mendelian matrix? It is a power interest matrix (i.e. power interest matrix) proposed by Aubrey Mendelow in 199 1. Also known as the stakeholder matrix.
As shown in the figure below:
Interest level
Low altitude
Low A B
The right to know the least impact.
force
High C D
Satisfy their key people
The matrix roughly divides all stakeholders into four quadrants.
Please refer to figure 1.4 on page 4 of the following document.
books.elsevier/...3 1.pdf
Question 4: What does this mean in the matrix? Look at the previous theorem. If you don't understand it, ask the math teacher.
Question 5: What is a matrix system? Video matrix refers to the electronic equipment that outputs M channels of video signals to N channels of monitoring equipment at will through array switching. Generally, the input of matrix is greater than the output, that is, M >；; N. Some video matrices also have audio switching function, which can switch video and audio signals synchronously. This matrix is also called audio-visual matrix. At present, there are two kinds of video matrices: analog matrix and digital matrix. Video matrix is generally used in various monitoring occasions.
Question 6: What does matrix mean? A rectangular array with m×n numbers arranged in m rows and n columns is called a matrix. The basic concept of matrix is very simple.
Question 7: What is Hadamard matrix? Hadamard matrix is an orthogonal square composed of+1 and-1 elements. The so-called orthogonal square matrix means that any two rows (or two columns) of it are orthogonal. Imagine a row (or column) as a function, and any two rows (or columns) are orthogonal. h2n =[Hn Hn； Biography of Hn -H H.
Hadamard matrix consists of+1 and-1 elements, and satisfies Hn * Hn'= nI (where Hn' is the transposition of Hn and I is identity matrix).
Property 1:
Hn is an orthogonal matrix, which means that any two rows (or two columns) are orthogonal. The decisive factor is
.
Property 2: The sum of squares of all elements in any row (column) is equal to the order of the square matrix. That is, let A be an N-order square matrix composed of+1 and-1 elements, if AA'= Ni (where A' is the transposition of A and I is the unit square matrix).
Property 3: The orders of Hadamard matrices are all multiples of 2 or 4.
Property 4: If m is a real square matrix of order n, if the absolute values of all elements of m are less than 1, then the determinant of m
If and only if m is a Hadamard matrix. This conclusion is derived from Hadamard inequality.